feat(main): relay override by environment variable

src/main.rs

@@ -1,4 +1,4 @@
-use std::env::args;
+use std::env::{args, var};
 use std::fmt::Display;
 use std::fs;
 use std::fs::File;
@@ -84,6 +84,11 @@ async fn main() {
 
     let client = Client::new(&keys);
     println!("My public key: {}", keys.public_key());
+    match var("MOSTR_RELAY") {
+        Ok(relay) => {
+            or_print(client.add_relay(relay).await);
+        }
+        _ => {
             match File::open(&relayfile).map(|f| BufReader::new(f).lines().flatten()) {
                 Ok(lines) => {
                     for line in lines {
@@ -106,6 +111,8 @@ async fn main() {
                     };
                 }
             }
+        }
+    }
 
     //let proxy = Some(SocketAddr::V4(SocketAddrV4::new(Ipv4Addr::LOCALHOST, 9050)));
     //client